The iPhone offers up a handful of IM apps, but IM+ works best. It's easy to set up, has an…
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The newest version of Imo isn't a huge update, but being able to send media directly in an IM is pretty nice—you just click the attachment button and select your media. The new update also brings support for chat groups, browsable and searchable chat history, and more. Hit the link to check out the new features.